My thanks to RadarScope for sponsoring this week’s DF RSS feed. RadarScope is a terrific premium weather radar display system for Mac and iOS — think of it as a prosumer-level weather app, targeting everyone from meteorologists and public safety officials to weather enthusiasts. It’s professional-grade software at a consumer price.

This week only, the Mac version of RadarScope is available for 33 percent off the regular price. If you’re a weather nerd, check it out.